Fig. 3

ROC curves of Model 1 for predicting the risk of LV thrombus persistence/recurrence at 3 months. A Training set. B Validation set. The blue curve represents the model discrimination ability of Model 1 in the training set (AUC 0.852, 95% CI 0.771–0.933). The red curve represents the model discrimination ability of Model 1 in the validation set (AUC 0.631, 95% CI 0.421–0.842). The point in the curve represents the optimal threshold along with the corresponding specificity and sensitivity respectively. LV, left ventricular; ROC, receiver operating characteristic; AUC, area under the ROC curve